Machine for molding cement blocks.



No. 773,137. PATENTEE OCT. 25, 1904. Z. HELDER.

MACHINE FOR MOLDING CEMENT BLOCKS. E

APPLIOATION FILED FEB. 6l 1904.

No MODEL.

Witnesses nven or Y 'M' Htcomegs UNITED STATEs Patented October` 25, 1,904.

PATENT OFFICE.

IVIAGHINEA FOR NIOLDING CEMENT BLOCKS.

SPECIFICATION forming part of Letters Patent N o.A 773,137, dated October 25, 1904.

i Application tiled February 6, 1904. Serial No. 192,470. (No model.)

To (LZ/Z whom, t may concern.'

Be it known that I, ZACHARIAH FIELDER, a citizen of the United States, residing at Hannibal, in the county of Marion and State of Missouri, have Yinvented a Portable Press or Machine for Molding Cement Blocks, of which the following is a specification.

This invention relates to an improved press or machine for molding` cement buildingblocks, and has for its object to provide a simple, inexpensive, and efficient device of this character mounted to travel on a section of track between the rails of which are placed the mold-boxes, so that by moving the press Y principle or sacrificing any of the advantages of this invention.

In the accompanying drawings, forming a part of this specification, Figure 1 is a side elevation of a portable press constructed in accordance with my invention. Fig. 2 is an end view of the same. Fig. 3 is a top plan view of a portion of the frame.

Similar numerals of reference indicate corresponding parts in all the figures of the drawings.

The press comprises an open-ended frame or carriage 5, mounted for travel on a section of track 6, the rails of which are secured in any suitable manner to cross-ties 7, preferably embedded in concrete, cement, or similar material, so as to form a smooth solid roadbed, las shown.

The frame of the press, which may be formedv of wood, metal, or other suitable material, consists of a pair of spaced longitudinallydisposed side beams 8, to which are bolted uprights 9, said upriglits being provided with laterally-extending iianges 9', which rest on the side beams and are provided with open- I is claimed is* ings for the reception of bolts 10. The uprights 9 are providedwith vertically-disposed coincident slots or recesses 11, which extend from the top of each upright to a point adjacent the lower edgethereof, said uprights being connected at the top by a cross-beam 12, the reduced ends 13 of which engage the slots 11 and are secured therein by bolts 14e.

Slidably mounted in the slots or recesses 11 is a plunger 15, operated through the medium of a pairl of depending screws 16, said screws having their smooth upper portions passing through bearing-collars 1 7, secured in suitable openings in the cross beam 12. rlhe screws 16 are each provided .at one end thereof with a spur gear or pinion` 18, which meshes with an intermediate gear 19, secured to a vertical stem 20, also journaled in a bearing-collar 21 on the cross-beam 12. The stem 20 is provided with a lever or sweep 22, by means of which the screws 16 are rotated to reciprocate the plunger 15.

Mounted on the road-bed at suitable intervals aretables or platforms 23, adapted to support the mold-boxes 24, said boxes being of' the ordinary knockdown type and provided with'the usual presser-plate 25.

In operation the mold-boxes being filled with cement or other suitable material andarranged at predetermined intervals in the roadbed the press is moved to a position directly over the first set and the sweep operated, thereby forcing the plunger downwardly in engagement with the presser-plates 25. After the first set of mold-boxes have been subjected to suflicient pressure the plunger is retracted and the press moved to the next set, the boxes of the -former set being removed and the molded blocks detached to dry.

Having thus described the invention, what 1. The combination with a track, of a plurality of mold-boxes arranged between the rails of said track, a carriage mounted for travel on the track and comprising an openended frame,a plunger mounted for vertical movement on said frame, a pair of screws engaging the plunger, pinions carried by said screws, and a gear-wheel meshing with said pinions for reciprocating the plunger.

IOC

2. The combination with a track, of a platform arranged between the rails of said track, mold-boxes supported by said platform, a carriage mounted for travel on the track and comprising an open-ended frame, a reciprocating plunger carried by said frame, a pair of screws engaging the plunger, pinions carried by said screws, an intermediate gear meshing with said pinions, means for guiding said plunger, and a lever carried by the intermediate gear for rotating the same to thereby reciprocate the plunger.

3. The combination with a track, of a plurality of mold-boxes arranged between the rails of said track, a carriage mounted for travel on the track and comprising an openended frame, slotted uprights secured to the side bars of the frame, a cross-beam connecting` said uprights, a plunger mounted for vertical movement in the slots of said uprights, a pluralityT of depending screws carried by the cross-beam and engaging' the plunger, and means for rotating the screws to thereby7 reciprocate the plunger.

4. The combination with a track. of a plu-A rality of mold-boxes arranged between the rails of said track, a carriage mounted for travel on the track and comprising an openended frame, a plunger mounted for vertical movement on said frame, and means for reciprocating said plunger.

5. The combination with a track, of a plurality of mold-boxes arranged between the rails of said track, a carriage mounted for travel on the track and comprising a pair of spaced longitudinal beams, uprights provided with coincident slots or recesses secured to said beams, a cross-beam connecting the upper portions of said uprights and engaging the slots or recesses therein, a plunger mounted for vertical movement on said slots or recesses, bearing-collars carried by the crossbeam, screws journaled in said collars and engaging the plunger, and means for rotating said screws to thereby reciprocate the plunger.

6. In a device of the class described, a traveling carriage comprising a pair of longitudinal beams, a pair of oppositely-disposed slotted uprights each provided with laterallyextending perforated flanges mounted on the side beams, bolts passing through the perforations in said flanges and engaging the side beams, a cross-beam connecting the upper ends of said uprights, a plunger slidably mounted in the slots of the uprights, a pair of depending screws journaled in the crossbeam and engaging the plunger, pinions carried by the screws, an intermediate gearwheel journaled in the cross-beam and meshing with the pinions, and a lever for rotating said intermediate gear to thereby reciprocate the plunger.

ZACHARIAH FIELDER. Witnesses:

GEORGE WV. HAM, ABNER S. SMITH. 

